Splendor of Sun comes from God

God is all powerful. He is almighty. He is the Lord of the Universe. Supreme God "Lord Krishna" Himself declares in Bhagwat-Gita that He himself is there as Splendor or Brilliance or Radiance of Sun.

God is present in all creation as His spark of brilliance is present in all the creation.

"yada aditya-gatam tejo
jagad bhasayate ’khilam
yac chandramasi yac chagnau
tat tejo viddhi mamakam" (Bhagwat Gita: Chapter Fifteen verse 12)

"Sri Krishna said: O Arjuna, The splendor of the Sun, which dissipates the darkness of this whole world, comes from Me. And the splendor of the moon and the splendor of fire are also from Me."

Jai Shri Krishna